Device for removing and replacing sleeves



Sept. 25, 1951 F H 2,568,998

' DEVICE FOR REMOVING AND REPLACING SLEEVES Filed Dec. 29, 1948 2 Sheets-Sheet l &

Sept. 25, 1951 v E; G. FLETCHER -DEVICE FOR REMOVING AND REPLACING SLEEVES Filed Dec. 29, 1948 2 Sheets-Sheet 2 I I IHHHHI I la n Patented Sept. 25,1951

. I SLEEVES Earl Gill Fletcher, Fort Dodge, Iowa Application December 29, 1948, Serial No. 67,965

, 1 Claim.

The principal object of my inventionis to 'pro-.

vide an efiicient tool for removing or-replacing sleeves in cylinders or like. 1

A further object of this invention is to provide a sleeve remover that will automatically slide past and then efiectively engage one end of the sleeve to be removed, thereby eliminating the disassembly of the tool prior to the operation and saving valuable time.

A still further object of this invention is to provide a sleeve removal and replacement tool that may be successfully and easily operated by only one workman.

A still further object of my invention is to provide a tool for facilitating the removal or replacement of cylinder sleeves that will automatically compensate for variations in sleeve wall thickness and within limits will handle bores of difierent diameters.

Still further objects of this invention is to'provide a device of the class described that is economical in manufacture and durable in use.

These and other objects will be apparent to those skilled in the art;

My invention consists in the construction, ar-

' rangement, and combination of the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, pointed out in my claim, and illustrated in the accompanying drawings, in which:

Fig. 1 is a side view of my device as used to remove a sleeve from a cylinder bore. a

Fig. 2 is a top plan view of the device taken from line 2-2 of Fig. 1. I

Fig. 3 is a longitudinal sectional view of the tool taken on line 3-3 of Fig. 2 and more fully and replaced in the cylinder bores of internal combustion engines. Tools herebefore used usually consist of threaded screw jack puller connected to a solid circular collar. To operate, the tool is disassembled and the screw jack is inserted downwardly inside the sleeve by one workman, another workman gets under the block and 2 fits the collar into the cylinder bore and under the sleeve. This is objectionable for several rea sons, 1. e., itrequires two operators, much time is wasted and the tool must be disassembled and then assembledi' Furthermore, a given circular collarfwill fit only one bore. I have overcome such objections as will hereinafter be appreciated. In the drawings I show for purpose of illustration a cylinder block I0 in dotted lines and a. sleeve I I therein in dotted lines. My tool When used for pulling sleeves consists mainly of the following parts; The numeral l2 designates a shaft having threads at both its upper and lower end portions. The numeral I 3 designates a'nut threaded onto the upper end of the shaft I2, having peripheral teeth l4, as shownin Fig. 2. The numeral I5 designates an inverted cup member detachably embracing the nut I3. The numeral I6 desig' nates a handle extending from the cup I5. The numeral I1 designates a second handle extending from cup I5 but being of hollow construction. The numeral I8 designates a rod rotatablyand slidably extending through the handle I1. This rod has a ratchet toothed inner end for engaging the teeth I4 of the nut at times. A spring I9 yieldingly holds this rod toward the teeth I4 of the nut. The outer end of the rod acts as a knob for manually pulling the rod away from the teeth Id of the nut. By rotating the rod one hundred and eighty degrees the ratchet tooth of the rod will be reversed to effectively contact the nut I3 for rotating it in the opposite direction. For holding the rod I8 in its two positions of rotation a pin 20 on the rod is capable of enter-' ing and engaging notches 2| in the handle end I I. The numeral '22 designates a ring cap loosely embracing the shaft I2 and is designed to rest on the engine block or on a collar 23, as shown in Fig. 3. A ball race 24 may be placed around the shaft I2 and between the nut I 3 and cap 22 if desired to make the device easier to operate. An extension handle 25 may be placed on the handle H to obtain greater leverage. The important part of my invention, however, is my expanding foot member threaded onto the lower end of the shaft I2. This member consists of a block 26 threaded onto the end portion of the shaft. This block is rectangular except for its two opposed ends 21 and 28 which are rounded to an are substantially that of the cylinder bore. In each of these two rounded end portions is a horizontal slit 29 designed to slidably receive a tongue member 30. These two tongue members 30 extend in opposite directions and each has its outer end rounded in an are substantially that of the arc of the cylinder bore. In the bottom of each of the slits 29 are two inwardly extending wells 3| for holding the expansion springs 32 as shown in Fig. 5. In the rear end of each of the tongues 30 are two forwardly extending wells 33 for receiving the forward ends of two of the spring 32. By this construction the four springs 32 will yieldingly hold the two tongues 30 outwardly in diametrically opposite direc-. tions, and transversely of the longitudinal axis of the shaft 12. To keep the two tongues 30 from any lateral movements I have provided the' two rearwardly extending guide fingers 34 and 35 on each rear corner end of each of the two In order to limit two tongues 30 I have provided detachable vertical pins 36 in the base block 26 and which pass through elongated openings 37 in the two tongues 30 as shown in Fig. 3. In order to give the maximum strength to the device, the slot openings 29 are so positioned in the base 26, that the thickness of the base below the slot openings is greater than its thickness above the slot openings, as shown in Fig. 4. To operate my device it is not necessary to disassemble it. A single operator has but to slide the bottom end of the device downwardly in the cylinder bore and inside the sleeve to be removed. This is made possible by the contracting and expanding foot portion. Obviously, when inserting the device downwardly in the bore, this foot element will be contracted, i. e. the tongues 30 will be forced inwardly against the action of the springs 32 by contacting the bore wall. During this operation the freeends of the tongues will be substantially in the same vertical plane as the rounded ends 21 and '28 of the base block. However, as soon as the outer end of the tongues 30 pass the sleeve they will be automatically forced outwardly by the springs 32 and will assume positions directly under the bottom rim of the sleeve.

This bottom rim of the sleeve is above the bottom end of the cylinder bore- As soon as the tongues move outwardly below the'bottom of the sleeve, and .aS shown in Fig. 3, it is merely necessary to rotate the nut l3 to the right, thereby bringing the sleeve upwardly relative to the cylinder block. From this it will readily be seen that the tool does not require disassembly and then assembly, "requires the services of only one operator, and is a great savinger in time and labor. If a sleeve to be removed has its top terminating substantially below the top of the cylinder block the collar ring 23 may be dispersed with. Also with my device the rounded ends of the block 26 above the tongues extends inside the lower end portion of the sleeve thereby aiding in preventing its distortion at time of removal. To force a new sleeve into a cylinder bore the expanding foot element is removed from the lower end of the shaft I2 and replaced by a head 38 which is threadable thereon. This head has a cross bar 39 extending through it, as shown in Fig. 6. This cross bar extends below the cylinder block and bisects the bore, thereby preventing the upward movement of the shaft I2 when the nut I3 is rotated with the member 22 resting on the top of the sleeve to be inserted, the rotation of the nut [3 to the right will cause it to screw downwardly on the shaft, thereby forcing the sleeve downwardlyin the cylinder bore. My device therefore is adaptable for either removing or replacing sleeves.

Some changes may be made in the construc-. tion and arrangement of my device for removing and replacing sleeves without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims, any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim:

An expansion foot for pulling sleeves, a body portion with straight sides and rounded ends, slot openings in the rounded ends of said body portion, tongue members slidably mountedin said slot openings having their outer ends rounded, to straight sided aligning projections on the two rear corners of each of said tongue members slidably engaging the straight sides of said body portion, respectively, a means for limiting the outward movement of said tongue members, springs yieldingly urging said tongue members outwardly; said springs exerting pressure on each rear corner ofv each of said tongue members.

EARL GILL FLETCHER.

REFERENCES CITED The following references are of record in the file of this patent:

STATES PATENTS Number Name Date 1,585,707 Hartsock May 25, 1926 1,705,789 Steirling Mar. 19, 1929 1,736,529 Goeller Nov. 19, 1929 

